Posteo is regarded as one of the best secure email providers, and the German company has been around since 2009. The service claims to have over half a million active accounts and gained prominence following the 2013 global surveillance disclosures.
Posteo isn’t just about privacy and security, though – the company cares about sustainability, too. The firm’s offices run on green energy from hydroelectric and wind sources, and they’ve sponsored green energy usage at their data center.
